/* Reset et styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --green-50: #f0fdf4;
    --green-100: #dcfce7;
    --green-200: #bbf7d0;
    --green-300: #86efac;
    --green-400: #4ade80;
    --green-500: #22c55e;
    --green-600: #16a34a;
    --green-700: #15803d;
    --green-800: #166534;
    --green-900: #14532d;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --white: #ffffff;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    line-height: 1.5;
    color: var(--gray-800);
    background: var(--white);
    padding-top: 72px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2rem;
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 0.75rem;
}

h4 {
    font-size: 1.125rem;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

p {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.container {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 2rem;
    height: 2rem;
    color: var(--green-600);
}

.logo-text {
    color: var(--green-800);
    font-weight: 500;
    font-size: 1.125rem;
}

.desktop-nav {
    display: none;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--gray-700);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 1rem;
}

.nav-link:hover {
    color: var(--green-600);
}

.mobile-menu-btn {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger {
    display: block;
    width: 1.5rem;
    height: 2px;
    background: var(--gray-700);
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--gray-700);
    left: 0;
    transition: transform 0.3s;
}

.hamburger::before {
    top: -0.5rem;
}

.hamburger::after {
    top: 0.5rem;
}

.mobile-menu-btn.active .hamburger {
    background: transparent;
}

.mobile-menu-btn.active .hamburger::before {
    transform: rotate(45deg) translate(0.35rem, 0.35rem);
}

.mobile-menu-btn.active .hamburger::after {
    transform: rotate(-45deg) translate(0.35rem, -0.35rem);
}

.mobile-nav {
    display: none;
    flex-direction: column;
    gap: 1rem;
    padding-bottom: 1rem;
}

.mobile-nav.active {
    display: flex;
}

.mobile-nav-link {
    color: var(--gray-700);
    text-decoration: none;
    transition: color 0.3s;
    text-align: left;
    font-size: 1rem;
}

.mobile-nav-link:hover {
    color: var(--green-600);
}

.mobile-btn {
    width: 100%;
}

@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: none;
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    border-radius: 0.5rem;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    line-height: 1.5;
}

.btn-primary {
    background: var(--green-600);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--green-700);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-white {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    padding: 0.75rem 1.5rem;
}

.btn-white:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.125rem;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--white);
    max-width: 56rem;
    margin: 0 auto;
    padding: 0 1rem;
}

.hero-title {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: #e5e7eb;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    justify-content: center;
}

@media (min-width: 640px) {
    .hero-buttons {
        flex-direction: row;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-description {
        font-size: 1.25rem;
    }
}

/* Services Section */
.services {
    padding: 5rem 0;
    background: var(--gray-50);
    position: relative;
    overflow: hidden;
}

.wave {
    position: absolute;
    left: 0;
    width: 100%;
    height: 60px;
    pointer-events: none;
}

.wave-top {
    top: 0;
    transform: translateY(-1px);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    color: var(--green-800);
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--gray-600);
    max-width: 42rem;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 2px solid var(--green-100);
    transition: all 0.3s;
    height: 100%;
}

.service-card:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--green-200);
    transform: translateY(-5px);
}

.service-icon {
    width: 3rem;
    height: 3rem;
    background: var(--green-100);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: all 0.3s;
}

.service-card:hover .service-icon {
    background: var(--green-600);
}

.service-icon svg {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--green-600);
    transition: color 0.3s;
}

.service-card:hover .service-icon svg {
    color: var(--white);
}

.service-card h3 {
    color: var(--green-800);
    margin-bottom: 0.75rem;
}

.service-card p {
    color: var(--gray-600);
    margin-bottom: 0;
}

/* About Section */
.about {
    padding: 5rem 0;
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 1024px) {
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.about-content h2 {
    color: var(--green-800);
    margin-bottom: 1.5rem;
}

.about-content p {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.text-highlight {
    color: var(--green-700);
    font-weight: 500;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.value-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.check-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--green-600);
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.value-item span {
    color: var(--gray-700);
    font-size: 0.875rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--green-50), rgba(220, 252, 231, 0.5));
    padding: 1.5rem;
    border-radius: 0.5rem;
    text-align: center;
    border: 2px solid var(--green-100);
    transition: all 0.3s;
}

.stat-card:hover {
    border-color: var(--green-300);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05) translateY(-5px);
}

.stat-icon {
    width: 2rem;
    height: 2rem;
    color: var(--green-600);
    margin: 0 auto 0.75rem;
}

.stat-value {
    color: var(--green-800);
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* CESU Section */
.cesu {
    padding: 5rem 0;
    background: var(--gray-50);
    position: relative;
    overflow: hidden;
}

.cesu-intro {
    background: var(--white);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 2px solid var(--green-200);
    box-shadow: var(--shadow-lg);
    margin-bottom: 3rem;
}

.cesu-intro p {
    color: var(--gray-700);
    margin-bottom: 1.5rem;
}

.cesu-highlight {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--green-50), rgba(220, 252, 231, 0.5));
    border-radius: 0.5rem;
    border: 2px solid var(--green-200);
}

.check-icon-large {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--green-600);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.cesu-highlight p {
    color: var(--green-800);
    margin-bottom: 0.5rem;
}

.cesu-highlight p:last-child {
    color: var(--green-700);
    margin-bottom: 0;
}

.cesu-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

@media (min-width: 1024px) {
    .cesu-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.cesu-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 2px solid var(--green-200);
    transition: all 0.3s;
}

.cesu-card:hover {
    box-shadow: var(--shadow-lg);
}

.cesu-card h3 {
    color: var(--green-800);
    margin-bottom: 1.5rem;
}

.cesu-steps {
    background: linear-gradient(135deg, var(--green-50), rgba(220, 252, 231, 0.5));
}

.advantages-list {
    list-style: none;
}

.advantages-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.advantages-list li:last-child {
    margin-bottom: 0;
}

.advantages-list span {
    color: var(--gray-700);
}

.steps-list {
    margin-bottom: 1.5rem;
}

.step-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.step-item:last-child {
    margin-bottom: 0;
}

.step-icon {
    width: 3rem;
    height: 3rem;
    background: var(--green-600);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.step-icon:hover {
    transform: scale(1.1) rotate(5deg);
}

.step-icon svg {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--white);
}

.step-item h4 {
    color: var(--green-800);
    margin-bottom: 0.25rem;
}

.step-item p {
    color: var(--gray-600);
    font-size: 0.875rem;
    margin-bottom: 0;
}

.cesu-note {
    padding: 1rem;
    background: var(--white);
    border-radius: 0.5rem;
    border: 1px solid var(--green-200);
}

.cesu-note p {
    color: var(--gray-600);
    font-size: 0.875rem;
    margin-bottom: 0;
}

.cesu-example {
    background: linear-gradient(to right, var(--green-600), var(--green-700));
    color: var(--white);
    padding: 2rem;
    border-radius: 0.5rem;
    text-align: center;
    box-shadow: var(--shadow-xl);
    transition: box-shadow 0.3s;
}

.cesu-example:hover {
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

.cesu-example h3 {
    color: var(--white);
    margin-bottom: 1rem;
}

.example-price {
    color: var(--green-50);
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.price-large {
    font-size: 1.5rem;
    font-weight: 500;
    margin: 0 0.5rem;
}

.example-result {
    color: var(--green-50);
    margin-bottom: 1.5rem;
}

.price-huge {
    font-size: 1.875rem;
    font-weight: 500;
    display: block;
    margin-top: 0.5rem;
}

.cesu-cta {
    margin-top: 1.5rem;
}

/* Contact Section */
.contact {
    padding: 5rem 0;
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 60rem;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.contact-card {
    display: block;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--green-50), rgba(220, 252, 231, 0.5));
    border-radius: 0.5rem;
    border: 2px solid var(--green-100);
    transition: all 0.3s;
    text-decoration: none;
    height: 100%;
}

.contact-card:hover {
    border-color: var(--green-300);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.contact-card > div:first-child {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-icon {
    width: 3rem;
    height: 3rem;
    background: var(--green-600);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.contact-card:hover .contact-icon {
    transform: scale(1.1) rotate(5deg);
}

.contact-icon svg {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--white);
}

.contact-card h3 {
    color: var(--green-800);
    margin-bottom: 0.25rem;
}

.contact-card p {
    color: var(--gray-600);
    margin-bottom: 0;
}

/* Footer */
.footer {
    background: var(--green-900);
    color: var(--white);
    padding: 3rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-logo .logo-icon {
    color: var(--green-400);
}

.footer-col p {
    color: var(--green-100);
    font-size: 0.875rem;
}

.footer-col h3 {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    color: var(--green-100);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--green-800);
    border-radius: 50%;
    transition: all 0.3s;
}

.social-link:hover {
    background: var(--green-700);
    transform: scale(1.1);
}

.social-link svg {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--white);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--green-800);
    text-align: center;
}

.footer-bottom p {
    color: var(--green-100);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* Responsive adjustments */
@media (max-width: 640px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
}